Movatterモバイル変換


[0]ホーム

URL:


cppreference.com
Namespaces
Variants
    Actions

      wcsstr

      From cppreference.com
      <c‎ |string‎ |wide
       
       
       
      Null-terminated wide strings
       
      Defined in header<wchar.h>
      wchar_t*wcsstr(constwchar_t*dest,constwchar_t*src);
      (1)(since C95)
      /*QWchar_t*/*wcsstr(/*QWchar_t*/*dest,constwchar_t*src);
      (2)(since C23)
      1) Finds the first occurrence of the wide stringsrc in the wide string pointed to bydest. The terminating null characters are not compared.
      2) Type-generic function equivalent to(1). LetT be an unqualified wide character object type.
      • Ifdest is of typeconst T*, the return type isconstwchar_t*.
      • Otherwise, ifdest is of typeT*, the return type iswchar_t*.
      • Otherwise, the behavior is undefined.
      If a macro definition of each of these generic functions is suppressed to access an actual function (e.g. if(wcsstr) or a function pointer is used), the actual function declaration(1) becomes visible.

      Contents

      [edit]Parameters

      dest - pointer to the null-terminated wide string to examine
      src - pointer to the null-terminated wide string to search for

      [edit]Return value

      Pointer to the first character of the found substring indest, or a null pointer if no such substring is found. Ifsrc points to an empty string,dest is returned.

      [edit]Example

      Run this code
      #include <stdio.h>#include <locale.h>#include <wchar.h> int main(void){setlocale(LC_ALL,"ru_RU.UTF-8"); wchar_t str[5][64]={        L"Строка, где есть подстрока 'но'.",        L"Строка, где такой подстроки нет.",        L"Он здесь.",        L"Здесь он.",        L"Его нет."}; for(size_t i=0; i<5;++i){if(wcsstr(str[i], L"но")){wprintf(L"%ls\n", str[i]);}}}

      Output:

      Строка, где есть подстрока 'но'.

      [edit]References

      • C11 standard (ISO/IEC 9899:2011):
      • 7.29.4.5.6 The wcsstr function (p: 437)
      • C99 standard (ISO/IEC 9899:1999):
      • 7.24.4.5.6 The wcsstr function (p: 383)

      [edit]See also

      (C95)
      finds the first occurrence of a wide character in a wide string
      (function)[edit]
      (C95)
      finds the last occurrence of a wide character in a wide string
      (function)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=c/string/wide/wcsstr&oldid=146093"

      [8]ページ先頭

      ©2009-2025 Movatter.jp